function Father(name,age){
	this.name = name;
	this.age = age;
}

Father.prototype.sayName = function () {
	console.log(this.name)
}

function Son(name,age,score){
	Father.call(this,name,age);
	this.score = score;
}
Son.prototype = new Father();
Son.prototype.constructor = Son;

Son.prototype.printScore = function () {
	console.log(this.score)
}

let son = new Son('黄帅帅',18,100);

console.log(son)

son.sayName();
son.printScore();